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In view of qualitative temperature measurement by scanning thermal microscopy, we introduce a model-based control law for a new microfabricated probe. The underlying model is the time-space two-scale electro-thermal model presented in [15], since it has the power to represent transcients of harmonic modulations. The control method accounts for an estimation of the heat source in the sample and for...
This paper proposes a nonlinear adaptive control (NAC) scheme for the voltage source converter based high voltage direct current (VSC-HVDC) light transmission system to handle various system uncertainties. The combinatorial effect of system nonlinearity, parameter uncertainties and external disturbances is aggregated into a perturbation term, which is estimated online by a perturbation observer (PO)...
With recent advancement in Radio Frequency Identification (RFID), RFID-based track-and-trace anti-counterfeiting has attracted considerable research interests. A track-and-trace anti-counterfeiting system requires an integral and reliable electronic pedigree (e-pedigree) to ensure high product visibility along the supply chain. With the continuous movements of large volumes of products along the supply...
This article proposes a model-free adaptive controller (MFAC) for BUCK converter by date-driven. It uses the model-free adaptive control algorithm based on the tight format linear method; this method has achieved an intelligent reasoning of the algorithm, and has rapid convergence for nonlinear controlled objects, so it restrains the time-varying parameters, the model mismatch and un-modeled dynamics...
We are currently developing software dedicated to multiscale and multiphysics modeling of arrays of micro and nanosystems. Unlike traditional software that is based on models built once and for all, here this is the software that constructs models. It is based on the mathematical Two-Scale Transform, a technique for asymptotic methods, together with formal specification and verification techniques...
According to the theory of constraints (TOC), bottleneck should be made full use while non-bottleneck should be subordinate to the bottleneck. However, for the multi-bottleneck permutation flow-shop scheduling problem (PFSP), different bottleneck causes different driving force resulting in different even conflicted scheduling solution. Aiming at this problem, the multi-objective mathematical model...
The mechanical behaviors of two kinds of hydrogenated Ti-6Al-4V alloy were investigated in quasi-static (material testing machine) and dynamic (split Hopkinson pressure bar) compression test. The stress-strain curves were obtained over the range of strain rates from 10-3s-1 to 1.5×103 s-1 and temperatures from 20°C (room temperature) to 700°C. The strain rate and temperature sensitivity of plastic...
For reflecting the variation of plasma composition under different arc temperature and pressure for non-equilibrium states, a micro arc physical model of vacuum circuit breaker (VCB) is proposed based on Eindhoven model, and the parameters of CuCr50 contact were taken into considerations. The variations of number density for different particles are obtained. The numerical computation results show...
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